Concrete temperature monitoring is a basic measurement conducted in most projects in order to ensure proper curing of the concrete after placement. In some cases, the temperature history along with a calibration curve is used to calculate the real-time concrete strength based on the maturity concept. Wired temperature sensors and maturity meters have been used for these purposes in the construction industry for several decades.
Some of these wired systems have logging capability unlike the basic ones that require a data logger to be connected to the wired sensor (e.g. thermocouple) at all times. For the earlier, a hand-held data logger is utilized to connect to the wire and extract the data from the logger (which is embedded in the concrete). In both systems, the thermocouple/logger is placed in the formwork somewhere on the rebar and the wire is extended to the edge of the form and its end is placed outside for access after pouring concrete.
In addition to the labor cost associated with using these wired systems (as explained in another blog post), there are several technical inefficiencies inherent to the wired temperature/maturity loggers and meters.
Wireless mobile-based temperature sensors and maturity meters (such as SmartRock2™) have been recently developed for the concrete industry. In addition to reducing the labor cost associated with testing, these wireless systems can significantly improve the efficiency required in fast-paced construction projects.